This disclosure generally relates to light assemblies, and more particularly relates to material application devices, for example spray guns, including attached light assemblies.
A material application device, such as a spray gun, is used to apply a coating material to an object, part, or other work piece or surface. The coating material can be a liquid, a powder, or other material as required, and can be electrostatically charged by the spray gun. Using electrostatically charged coating materials can have many benefits. For example, the use of electrostatically charged coating materials limits over-spray, as coating material particles that do not contact the work piece will be drawn to the work piece due to the electrostatic charge. This aids in eliminating wasted coating material, thus cutting costs.
During operation of the spray gun, which may be manually operated, a user may need to periodically cease using the spray gun and visually inspect the work piece to ensure that the work piece has been sufficiently coated. Due to the fine nature of some coating materials, or ambient conditions in which spraying occurs, such as low lighting, the amount or consistency of coating material applied to the work piece may not be readily apparent to the user without external illumination. To inspect the work piece, the user often needs to employ the use of a light, such as an LED light, to illuminate the work area. However, conventional lights add to the number of tools required for a coating operation and require connection to external power sources.
Therefore, there is a need for a light assembly that is capable of attaching to spray guns and does not require a physical connection to external power sources.
A spray gun for spraying electrostatically charged coating material is disclosed. The spray gun includes a gun body comprising a barrel, a nozzle assembly extending from the barrel in a longitudinal direction, a voltage multiplier, and an actuator assembly configured to transition the voltage multiplier between an activated state and a deactivated state. The spray gun includes a light assembly coupled to the gun body, the light assembly including a light and circuitry electrically connected to the light. The circuitry is configured to supply electrical energy inductively obtained by the circuitry to the light when the voltage multiplier is in the activated state.
Another embodiment of the present invention is a light assembly configured to be coupled to a spray gun for spraying electrostatically charged coating material, where the spray gun includes a voltage multiplier transitionable between an activated state, in which the voltage multiplier produced a magnetic field, and a deactivated state, where the voltage multiplier does not produce the magnetic field. The light assembly includes a housing, a light attached to the housing, and circuitry contained within the housing, the circuitry being electrically connected to the light and configured to supply electrical energy inductively obtained by the circuitry to the light.
A further embodiment of the present disclosure is a spray gun for spraying electrostatically charged coating material. The spray gun includes a gun body comprising a barrel, a nozzle assembly extending from the barrel in a longitudinal direction, a voltage multiplier, and an actuator assembly configured to transition the voltage multiplier between an activated state and a deactivated state. The spray gun also includes a light assembly coupled to the gun body, the light assembly including a housing, a light, and circuitry electrically connected to the light, as well as a lens cover releasably attached to the housing to change the characteristics of the light that is emitted from the light assembly.
An embodiment of the present disclosure is a manually held spray gun for spraying electrostatically charged coating material. The spray gun includes a gun body comprising a barrel, a nozzle assembly extending from the barrel in a longitudinal direction, a voltage multiplier, and a trigger assembly to control the spraying of the electrostatically charged coating material from the spray gun. The spray gun also includes a light assembly coupled to the gun body, the light assembly including a light and circuitry electrically connected to the light, as well as a control member on the gun for changing a characteristic of the light emitted by the light assembly.
An additional embodiment of the present disclosure is a spray gun for spraying electrostatically charged coating material. The spray gun includes a gun body comprising a barrel, a nozzle assembly extending from the barrel in a longitudinal direction, a voltage multiplier, and an actuator assembly to control the spraying of coating material from the gun. The spray gun also includes a light assembly coupled to the gun body, the light assembly including a light and circuitry electrically connected to the light, wherein the light assembly is contained in a housing, where there are no electrical connectors passing through the wall of the housing.
The foregoing summary, as well as the following detailed description, will be better understood when read in conjunction with the appended drawings. The drawings show illustrative embodiments of the disclosure. It should be understood, however, that the application is not limited to the precise arrangements and instrumentalities shown.
Described herein is a spray gun 10, 10a, 10b that includes a voltage multiplier 140, 666 and a transformer 160, 668 that produces a magnetic field H. The spray gun 10 further includes a light assembly 15, 15a, where the light assembly 15, 15a includes an LED 268, 400 configured to be powered by electrical energy inductively obtained from the magnetic field H. Certain terminology is used to describe the spray gun 10, 10a, 10b in the following description for convenience only and is not limiting. The words “right”, “left”, “lower,” and “upper” designate directions in the drawings to which reference is made. The words “inner” and “outer” refer to directions toward and away from, respectively, the geometric center of the description to describe spray gun 10, 10a, 10b and related parts thereof. The words “forward” and “rearward” refer to directions in a longitudinal direction 2 and a direction opposite the longitudinal direction 2 along the spray gun 10, 10a, 10b and related parts thereof. The terminology includes the above-listed words, derivatives thereof and words of similar import.
Unless otherwise specified herein, the terms “longitudinal,” “vertical,” and “lateral” are used to describe the orthogonal directional components of various components of the spray gun 10, 10a, 10b, as designated by the longitudinal direction 2, lateral direction 3, and vertical direction 4. It should be appreciated that while the longitudinal and lateral directions 2, 3 are illustrated as extending along a horizontal plane, and the vertical direction 4 is illustrated as extending along a vertical plane, the planes that encompass the various directions may differ during use.
With reference to
As shown, the handle 32 is configured to be manually gripped and may include a portion that contacts the user's hand and is grounded. In one embodiment, the handle 32 is connected to an electrical ground 90 through a wire 91 (
Turning to
The spray gun 10 also includes a power source 93 that is configured to power a voltage multiplier 140 (
Simultaneously upon opening the coating material flow control valve 61 and closing the switch 94, the controller 72 may actuate a valve 97 from a closed position to an open position to enable air under pressure from an electrode wash air source 96 to flow through an air passageway 148 (
The spray gun 10 may also include a purge air supply 78 controlled by the controller 72. The purge air supply 78 may be used to provide pressurized purge air or other gas through a control valve 79 and a purge hose 82, which connects the purge air supply 78 to the spray gun 10. The purge hose 82 may be connectable to a suitable connector (not shown) on the handle 32. When the purge air supply 78 is to be accessed, a signal is sent to the controller 72 to initiate the flow of purge air through the control valve 79, thus opening the control valve 79 from a closed position to an open position. At this time, coating material flow control valve 61 is closed to interrupt the flow of coating material through the supply hose 64. In particular, purge air may be introduced into the spray gun 10 through an inlet (not shown) disposed through the base 33 of the handle 32. The purge air supply 78 and related elements may be configured to purge a coating material flow path 19 (described further below) whenever a new coating material is to be introduced that has different features, such as a different color, than the previous coating material. This can prevent unwanted contamination of the new coating material.
Referring to
With reference to
With continued reference to
Many different types of electrodes may be used, such as electrode tips that are positioned outside the nozzle assembly 36. Additionally, many different types of power supply designs, configurations, and locations may be used other than the voltage multiplier 140 disposed within the spray gun 10. For example, the spray gun 10 may include a power supply that is completely external to the spray gun 10. The electrode support assembly 112 also includes flow passages (not shown) that allow coating material to flow past the spider 118 and into the spray nozzle 20. An air passageway 148, which receives pressurized air from an electrode wash air source 96, may extend up through the handle 32, through the barrel 34, and into the electrode support assembly 112 and into the nozzle 20 to provide electrode wash air to the nozzle assembly 36. In particular, the pressurized air may flow through the air passageway 148, through an air fitting (not shown), and into the ducts 113 and 114 of the spider 118.
Turning to
The voltage multiplier 140 is electrically connected to the electrical input 170, which connects the voltage multiplier 140 to the electrical cable 70 of the spray gun 10, and likewise to the power source 93. When the controller 72 actuates the switch 94 from an open position to a closed position, the voltage multiplier 140 is activated, such that the voltage multiplier 140 is electrically connected to the power source 93. Likewise, when the controller 72 actuates the switch 94 from the closed position to the open position, the voltage multiplier 140 is deactivated, such that the voltage multiplier 140 is electrically disconnected from the power source 93. As a result, the voltage multiplier 140 is configured to alternate between an activated state and a deactivated state. In one embodiment, the actuator assembly 45 directs the controller 72 to actuate the switch 94. As such, in this embodiment, the actuator assembly 45 switches the voltage multiplier 140 between the activated state and the deactivated state.
The power source 93 may be configured to provide low voltage direct current to the voltage multiplier 140. The voltage multiplier 140 may include an oscillator that converts the low voltage direct current from the power source 93 to an alternating current. The voltage multiplier 140 may further include a transformer 160 that increases the voltage from the oscillator. The voltage multiplier 140 may increase the voltage to a very high voltage, such as to 80,000 to 100,000 volts, for example. The transformer 160 may include a first end 164a and a second end 164b opposite the first end 164a along a first central axis A1. In one embodiment, the first central axis A1 may be parallel to the longitudinal direction 2. However, the first central axis A1 may extend along any of the longitudinal direction 2, lateral direction 3, vertical direction 4, or any combination thereof. When the voltage multiplier 140 is activated and a voltage is applied to the voltage multiplier 140, the transformer 160 produces a magnetic field H.
With reference to
To secure the batteries 248 within the battery housing 200, the light assembly 15 can include a first battery cap assembly 212a and a second battery cap assembly 212b. Though two battery cap assemblies are shown, the number of battery cap assemblies can vary, but will generally correspond to the number of batteries 248 contained within the battery housing 200. Each of the first and second battery cap assemblies 212a, 212b can include a battery cap 224 and a battery contact 228. The battery contact 228 can comprise a conductive material, such as nickel plated steel. However, it is contemplated that any variety of conductive materials can comprise the battery contacts 228. When the light assembly 15 is fully assembled, each battery contact 228 can be disposed between the respective battery cap 224 and the first end 248a of the respective battery 248, such that the battery contact 228 is in direct contact with the first end 248a of the battery 248. As a result, the battery contact 228 functions as a conductive medium between the first end 248a of the battery 248 and the LED PCA 256. Each battery cap 224 can secure the corresponding battery contact 228 and battery 248 within the battery housing 200, as well as the battery contact 228 in direct contact with the battery 248, through direct engagement with the battery housing 200. In the depicted embodiment, each battery cap 224 defines an external threading that is configured to engage an internal threading defined on the inner surface of the battery housing 200 to releasably lock the battery cap 224 to the battery housing 200. Though a threaded engagement is shown for securing the battery caps 224 to the battery housing 200, other methods of engagement are contemplated, such as a press-fit or snap engagement.
Each of the battery caps 224 can define a respective key 220a, 220b in a side of the battery cap 224 that faces outward when the first and second battery cap assemblies 212a, 212b are attached to the battery housing 200. The keys 220a, 220b have multiple functions—their shape can indicate to an operator of the spray gun 10 the polarity of the batteries 248 disposed within the battery housing 200, as well as be shaped to allow the operator to engage the battery caps 224 with a particular tool for unthreading the first and second battery cap assemblies 212a, 212b from the battery housing 200. For example, the keys 220a, 220b can be shaped as plus signs. This indicates to the operator that the first end 248a of the batteries 248 have a positive polarity, and allows the operator to disengage the first and second battery cap assemblies 212a, 212b from the battery housing 200 using either a standard or Phillips screwdriver. Though the keys 220a, 220b are shown shaped as plus signs, other shapes and configurations are contemplated.
The light assembly 15 can also include a lanyard 208 for receiving first and second battery cap assemblies 212a, 212b. The lanyard 208 can be substantially flexible, and can be comprised of plastic or a similarly bendable material. The lanyard 208 defines an elastomer that defines a first opening 209a on one lateral side and a second opening 209b on the other lateral side. Though two openings are depicted, the lanyard 208 can define more openings as desired, though the number of openings will generally correspond to the number of battery cap assemblies. The first opening 209a is sized to receive the battery cap 224 of the first battery cap assembly 212a, while the second opening 209b is sized to receive the battery cap 224 of the second battery cap assembly 212b. When the first and second battery cap assemblies 212a, 212b are disposed through the first and second openings 209a, 209b and are attached to the battery housing 200, each of the battery caps 224 presses against the lanyard 208 such that the lanyard 208 is firmly secured between the battery caps 224 and the battery housing 200. The first and second openings 209a, 209b of the lanyard 208 aid in preventing the first and second battery cap assemblies 212a, 212b from becoming misplaced when the first and second battery cap assemblies 212a, 212b are detached from the battery housing 200, as the first and second battery cap assemblies 212a, 212b can remain disposed through the first and second openings 209a, 209b. As a result, the lanyard 208 and the first and second battery cap assemblies 212a, 212b can be moved as a unit when detached from the battery housing 200. When the first and second battery cap assemblies 212a, 212b secure the lanyard 208 to the battery housing 200, a gap 210 is defined between the lanyard 208 and the battery housing 200. The gap 210 can be centrally located between the first battery cap assembly 212a and second battery cap assembly 212b, and can be configured to receive the applicator hook 40 of the spray gun 10.
Continuing with
On the end of the battery housing 200 opposite the lanyard 208, the battery housing 200 can be capped with a lens housing 260. Like the battery housing 200, the lens housing 260 may be comprised of a polycarbonate plastic, though other materials are contemplated. The lens housing 260 defines a first side 260a that faces the LED PCA 256 and a second side 260b opposite the first side 260a that faces away from the LED PCA 256. The lens housing 260 may be permanently attached to the battery housing 200 through a weld, which can be an ultrasonic continuous weld. Alternatively, the lens housing 260 can be releasably attached to the battery housing 200, such as through a snap-fit or bayonet type engagement. The lens housing 260 can define a recess 262 that extends from a large opening on the second side 260b of the lens housing 260 to a smaller opening on the first side 260a of the lens housing 260. When the light assembly 15 is fully assembled, the LED 268 attached to the LED PCA 256 at least partially extends through the smaller opening in the first side 260a of the lens housing 260, such that the LED 268 is at least partially disposed in the recess 262. Disposed within the recess 262 is a lens 264 and attached to the lens housing 260 is a lens cover 204, each of which controls the size, shape, and color of the light that is produced by the LED 268 and is emitted from the light assembly 15. For example, the lens cover 204 or lens 264 could be colored to provide the desired color of light. Alternatively, the LED 268 could be replaced to change the desired color of light. The lens cover 204 can be comprised of a substantially transparent material, and functions to protect the lens 264 from environmental contaminants that can damage or obstruct the lens 264. Both the lens 264 and the lens cover 204 can be permanently attached to the lens housing 260, such as through a weld, which can be an ultrasonic continuous weld. Alternatively, both the lens 264 and the lens cover 204 can be releasably attached to the lens housing 260, as will be described further below.
Continuing with
After the light assembly 15 has been secured to the spray gun 10 with the bracket 240, the applicator hook 40 can be attached to the spray gun 10. The top of the applicator hook 40 is inserted through the gap 210 defined between the lanyard 208 and the battery housing 200 of the light assembly 15, such that the lanyard 208 contacts the rearward side of the applicator hook 40 and a bore (not shown) that extends through the applicator hook 40 aligns with a bore (not shown) that extends into the spray gun 10 from the rear side of the barrel 34. Once the applicator hook 40 is in place, the operator of the spray gun 10 inserts a screw 244 through the bores of the applicator hook 40 and the barrel 34 of the spray gun 10 to secure the applicator hook 40 to the spray gun 10, which likewise further secures the light assembly 15 to the spray gun 10. Optionally, before the screw 244 is inserted, a bezel 42 can be aligned with the applicator hook 40, and the screw 244 can be inserted through the bezel 42, the applicator hook 40, and into the barrel 34 of the spray gun 10. Though one method of attaching the light assembly 15 to the spray gun 10 is described, other methods of attaching the light assembly 15 are also contemplated.
In operation, the light assembly 15 obtains power either through the batteries 248 or by harvesting energy from the magnetic field H produced by the transformer 160 of the voltage multiplier 140. Continuing with
The boost converter 314 can supply power to the holdup time logic and switch element such as a pass MOSFET 310. This portion of the circuit 300 is used to determine whether an LED driver 318 is being powered from the resonant circuit 302 or the batteries 248, which will be described further below. When the LED driver 318 is powered from the batteries 248, the holdup time logic and pass MOSFET 310 provides the LED driver 318 with power from the boost converter 314 for a predetermined or adjustable period of time. For example, the period of time can be 15 seconds. The period of time can be a manufacturer setting of the light assembly 15, or can be manipulated by the operator of the spray gun 10 as desired. This limitation of power to the LED driver 318 from the boost converter 314 for a finite period of time helps increase the operating lifetime of the batteries 248 and prevents the LED driver 318 from continuously drawing power from the batteries 248 during periods of inactivity of the spray gun 10.
In addition to the batteries 248, the LED 268 can also be powered by a resonant circuit 302. The resonant circuit 302 comprises an inductor 259 and at least one capacitor. For example, in one embodiment the resonant circuit 302 includes three capacitors. In operation, as the light assembly 15 (and likewise the inductor PCA 258) is mounted to the top of the spray gun 10 at the rear of the barrel 34, the circuit 300, and particularly the inductor 259, is within the magnetic field H produced by the transformer 160 of the voltage multiplier 140. The magnetic field H induces a current in the inductor 259 of the resonant circuit 302, and the resulting energy is stored in the capacitors. The output of the resonant circuit 302 is an alternating current voltage, which is rectified into a DC voltage. For example, the full wave rectifier 306 is used to convert the alternating current voltage from the resonant circuit 302 into a direct current voltage, which can be stored in a plurality of capacitors (not shown). Due to the minimal bulk storage in the capacitors, upon the removal of the magnetic field H, the voltage from the resonant circuit 302 collapses quickly.
In one embodiment, the resonant frequency of the resonant circuit 302 can be tuned to be the same as the drive frequency of the voltage multiplier 140 according to the below equation:
F=1/[2*π*√(L*C)] Equation 1
where:
Referring to
Referring to
Referring to
The circuit 300 also includes the LED driver 318, which drives the LED 268. The LED driver 318 drives the LED 268 either through power received from the batteries 248, or power received from the resonant circuit 302. In one embodiment, the LED driver 318 can power the LED 268 with a different current depending on the source of the power. For example, the LED driver 318 can power the LED 268 at a first amperage when receiving power from the resonant circuit 302, and subsequently power the LED 268 at a second amperage different than the first amperage when receiving power from the batteries 248.
In operation, a user will manually grip the handle 32 of the gun body 11 when the user intends to begin using the spray gun 10. When the user wants to begin using the spray gun 10, the user may actuate the spray gun 10 by manually actuating the actuator assembly 45, which may be a trigger assembly 50. Actuating the actuator assembly 45 directs the controller 72 to switch the coating material flow control valve 61 from a closed position to an open position. This allows coating material to flow from the coating material supply 60, through the coating material flow control valve 61, and through the supply hose to 64 to the spray gun 10. From there, the coating material flows along the coating material flow path 19, which extends from the handle 32, through the barrel 34, and to the nozzle assembly 36. The coating material then becomes charged by the electrode 100 before exiting the nozzle assembly 36. Simultaneous with the opening of the coating material flow control valve 61, the controller 72 may switch the valve 97 from a closed position to an open condition to enable pressurized air from the electrode wash air source 96 to flow through the air passageway 148. The air passageway 148 extends through the handle 32 of the spray gun 10, through the barrel 34, and to the nozzle assembly 36 so as to provide a flow of pressurized air across the electrode tip 100a to help prevent accumulation of coating material on the electrode tip 100a.
Additionally, when the user actuates the actuator assembly 45, the controller 72 may actuate the switch 94 from the illustrated open condition (
However, when the user no longer actuates the actuator assembly 45, the voltage multiplier 140 is switched from the activated state to the deactivated state, such that the transformer 160 ceases creating the magnetic field H. As a result, a current is no longer induced in the inductor 259 of the inductor PCA 258, and the resonant circuit 302 can no longer provide power to the LED 268. In this situation, the holdup time logic and pass MOSFET 310 detects the cessation of power from the resonant circuit 302, and directs the LED driver 318 to draw power from the boost converter 314, and thus the batteries 248. As such, the LED 268 can remain in the lit state for a period of time when the spray gun 10 is not in use so that the operator of the spray gun 10 can continue to inspect the work piece. This period of time, as described above, is controlled by the holdup time logic and pass MOSFET 310. After the period of time expires, the holdup time logic and pass MOSFET 310 prevents the LED 268 from further drawing power from the batteries 248. It should be noted that regardless of whether the LED 268 is being powered by the resonant circuit 302 or the batteries 248, the light assembly 15 is not electrically connected to any portion of the spray gun 10.
The ability of the LED 268 to remain in the lit state through drawing power from the batteries 248 after the voltage multiplier 140 has been switched to the deactivated state provides several benefits. First, time is saved, as the operator does not have to switch to a second tool to provide light when inspecting the work piece. This simplifies a coating operation, as fewer tools are required. Further, power is saved, as the light assembly 15 does not require an additional power source beyond the power source 93 used to power the spray gun 10 and the batteries 248 contained in the battery housing 200. The light assembly 15 described above can also be applied to existing spray guns lacking built in light sources, which lowers total coating costs by preventing the need to acquire additional coating tools.
Each particular light assembly 15 can define an optimal distance at which the light emitted by the LED 268 will illuminate the particular work piece, as well as a color that optimally contrasts with a particular coating material. This is typically dictated by the characteristics of the lens 264 attached to the lens housing 260. However, given the different types and sizes of work pieces and the varieties of coating materials that spray guns 10 can be utilized with, a particular light assembly 15 will not be optimal for use in every coating application. For example, in one coating operation the work piece can be situated 8-10 inches from the spray gun 10, but in another coating operation the work piece can be situated further from the spray gun 10. As a result, the light assembly 15 can be configured such that the lens 264 and/or lens cover 204 is releasably attached to the lens housing 260, such that an operator of the spray gun 10 can detach a particular lens 264 and/or lens cover 204 from the light assembly 15 when it becomes suboptimal for use with a particular coating operation, and attach a different lens 264 and/or lens cover 204 having preferred qualities. The lens 264 and lens cover 204 can be releasably attached to the lens housing 260 through a variety of means, such as bayonet style, threading, or snap fit engagement. Different lenses 264 and lens covers 204 can cause the light from the LED 268 to embody different colors, such as white, red, or green, which each provide an optimal contrast with different types and colors of coating materials. Though specific colors are listed, they are not meant to be exhaustive. Alternatively, a colored cap could be put on the lens cover 204 to produce the desired color of light. Further, different lenses 264 and/or lens covers 204 can increase or decrease the optimal distance at which the light from the LED 268 illuminates the work piece, also referred to as the focus (discussed further below) by either increasing or decreasing the departure angle of the light from the light assembly 15.
With reference to
Referring to
The display 430 can be attached to or recessed within the gun body 11a, and can include a visual indicator device 434 that includes a pair of segmented LEDs for displaying an operational value of the spray gun 10a or a related component. For example, the display 430 can include first and second LED displays 446, 450. Each of the first and second LED displays 446, 450 is depicted as including seven segmented LED displays. However, it is contemplated that the first and second LED displays 446, 450 can be configured otherwise, such as comprising LCD displays, etc. Further, in other embodiments the display 430 can include more than two or only one LED display as desired.
For changing the value of the parameter shown on the visual indicator device 434, the display 430 can include a first button 454 and a second button 458 spaced from the first button 454. As shown, the first button 454 is labeled with a minus sign, and can be used to decrease the value shown on the visual indicator device 434, while the second button 458 is labeled with a plus sign, and can be used to increase the value shown on the visual indicator device 434. By pressing and releasing the first button 454 or the second button 458, the value shown on the visual indicator device 434, and thus the corresponding value of the operating parameter of the spray gun 10a, can be respectively decreased or increased by one. By pressing and holding the first button 454 or the second button 458, the value shown on the visual indicator device 434, and thus the corresponding value of the operating parameter of the spray gun 10a, can be respectively decreased or increased until the first button 454 or the second button 458 is no longer held. In other embodiments, the first and second buttons 454, 458 can be replaced with a numerical keypad for manually inputting the desired value of the operating parameter represented on the visual indicator device 434.
The display 430 may also include one or more manually actuated inputs 436, which in the present embodiment are depicted as pushbutton membrane switches. In the depicted embodiment, the manually actuated inputs 436 includes a first input 438 and a second input 442. Each of the manually actuated inputs 436 can be used to alternate between various operational modes of the spray gun 10a, as well as between different operating parameters for display on the visual indicator device 434 and control with the first and second buttons 454, 458. These operational parameters can include the brightness level, focus level, time mode, color temperature, etc., as will be discussed further below. Though two manually actuated inputs 436 are depicted, the display 430 can alternatively include only one or more than two manually actuated inputs. Further, the manually actuated inputs 436 can alternatively be configured as dials, knobs, buttons, or any other type of input that can be manually actuated by an operator of the spray gun 10a.
Now referring to
The circuit 410 may also include a rechargeable battery 515 that is configured to power the LED 400, as well as store electrical energy received from the inductor 259. The rechargeable battery 515 may be removably integrated into the circuit 410 such that the rechargeable battery 515 may be replaced as needed. The electrical energy stored by the rechargeable battery 515 may be used to power the LED 400 when the voltage multiplier 140 is in the deactivated state. The rechargeable battery 515 may also include any number of rechargeable batteries as desired, such as two or three rechargeable batteries. The circuit 410 may include a battery charger circuit 510 that is configured to control charging of the rechargeable battery 515. In one embodiment, the battery charger circuit 510 is capable of sensing the level of energy of the rechargeable battery 515, and subsequently charging or not charging the rechargeable battery 515 based upon this sensed level of energy. When the circuit 410 includes more than one rechargeable battery 515, the circuit 410 may also include a corresponding number of battery charger circuits 510. For example, if the circuit 410 includes two rechargeable batteries 515, the circuit will also include two battery charger circuits 510, with each battery charger circuit 510 corresponding to a respective rechargeable battery 515. Likewise, if the circuit 410 includes three rechargeable batteries 515, the circuit will also include three battery charger circuits 510.
Alternatively, the circuit 410 may include capacitors to store energy received from the inductor 259, as well as power the LED 400 using the stored energy received from the inductor 259 when the voltage multiplier 140 is in the deactivated state. The circuit 410 may include capacitors in place of, or in combination with, the rechargeable battery 515.
With continued reference to
In operation, a user will manually grip the handle 32 of the gun body 11a when the user intends to begin using the spray gun 10a. When the user wants to begin using the spray gun 10a, the user may actuate the spray gun 10a by manually actuating the actuator assembly 45, which may be the trigger assembly 50. Actuating the actuator assembly 45 directs the controller 72 to switch the coating material flow control valve 61 from a closed position to an open position. This allows coating material to flow from the coating material supply 60, through the coating material flow control valve 61, and through the supply hose to 64 to the spray gun 10a. From there, the coating material flows along the coating material flow path 19, which extends from the handle 32, through the barrel 34a, and to the nozzle assembly 36. The coating material then becomes charged by the electrode 100 before exiting the nozzle assembly 36. Simultaneous with the opening of the coating material flow control valve 61, the controller 72 may switch the valve 97 from a closed position to an open condition to enable pressurized air from the electrode wash air source 96 to flow through the air passageway 148. The air passageway 148 extends through the handle 32 of the spray gun 10a, through the barrel 34a, and to the nozzle assembly 36 so as to provide a flow of pressurized air across the nozzle 20 to help prevent accumulation of coating material at the electrode tip 100a.
Additionally, when the user actuates the actuator assembly 45, the controller 72 may actuate the switch 94 from the illustrated open condition (
Due to the electrical energy obtained by the inductor 259 in the power supply 401, the power supply 401 is capable of switching the LED 400 from an unlit state to a lit state when the actuator assembly 45 switches the voltage multiplier 140 from the deactivated state to the activated state. The LED 400 allows the user of the spray gun 10a to better inspect the work piece to which the coating material is being applied during operation of the spray gun 10a and ensure that the coating material is being applied in a satisfactory manner. Additionally, the capacitors and/or the rechargeable battery 515 can provide the LED 400 with stored electrical energy after the voltage multiplier 140 has been switched from the activated state to the deactivated state. As a result, the user can continue inspection of the work piece after the coating operation has been completed to ensure coating quality. The ability of the LED 400 to remain in the lit state through stored electrical energy after the voltage multiplier 140 has been switched to the deactivated state provides several benefits. First, time is saved, as the operator does not have switch to a second tool to provide light when inspecting the work piece. Also, this simplifies a coating operation, as fewer tools are required. Further, power is saved, as the light assembly 15a does not require an additional power source beyond the power source 93 used to power the spray gun 10a. However, in one embodiment, the light assembly 15a may also include a wired connection that connects the power supply 401 to an external power source (not shown) as a backup to the power supply 401. The external power source may be used in a situation when the power source 93 is deactivated and the power supply 401 no longer carries energy.
When the power supply 401 includes more than one rechargeable battery 515, the battery charger circuit 510 may control how the rechargeable batteries 515 are charged. In one embodiment, the power supply 401 can include first and second rechargeable batteries 515 and first and second battery charger circuits 510 that correspond to the first and second rechargeable batteries 515, respectively. As described above, when the voltage multiplier 140 is in the activated state, the inductor 259 in the circuit 410 obtains electrical energy from the magnetic field H. As a result, the circuit 410 may charge the first and second rechargeable batteries 515 through the first and second battery charger circuits 510. The first and second battery charger circuits 510 may be configured to monitor the energy level of each respective battery, and subsequently determine when the first and second rechargeable batteries 515 have reached a full charge. When the first and second rechargeable batteries 515 have reached a full charge, the first and second battery charger circuits 510 may direct the circuit 410 to cease charging the first and second rechargeable batteries 515 and rather use the electrical energy to power the LED 400. During the course of operating the spray gun 10a, a situation may arise where one of the first and second rechargeable batteries 515 charges faster than the other. In this situation, the one of the first and second battery charger circuits 510 that corresponds to the rechargeable battery 515 that has charged first will detect the full charge, and will direct the circuit 410 to only charge the other one of the first and second rechargeable batteries 515 that has not been fully charged yet, as well as only power the LED 400 using the rechargeable battery 515 that has fully charged. Also, during the course of operating the spray gun 10a, a situation may arise where one of the first and second rechargeable batteries 515 has a low charge, while the other rechargeable battery 515 has a higher charge. In this situation, the one of the first and second battery charger circuits 510 that corresponds to the rechargeable battery 515 with the low charge will detect the low charge, and will direct the circuit 410 to only charge the one of the first and second rechargeable batteries 515 with the low charge, as well as only power the LED 400 using the rechargeable battery 515 that has the higher charge.
The light assembly 15a may be operated in several time modes. Each time mode corresponds to a period of time that the LED 400 remains in the lit state after the voltage multiplier 140 switches from the activated state to the deactivated state. The time mode employed by the spray gun 10a at any given time may be controlled and adjusted via the holdup time control circuit 505. The controller 72 of the spray gun 10a may change the time mode by adjusting a user input (not shown) connected to the holdup time control circuit 505, or by programming the holdup time control circuit 505 before initiating use of the spray gun 10a. In a first time mode, when the actuator assembly 45 switches the voltage multiplier 140 from the activated state to the deactivated state, the power supply 401 switches the LED 400 from the lit state to the unlit state. In this time mode, the electrical energy stored in the power supply 401 is not employed after the voltage multiplier 140 is switched to the deactivated state. In a second time mode, the power supply 401 is configured to maintain the LED 400 in the lit state for a fixed period of time following the actuator assembly 45 switching the voltage multiplier 140 from the activated state to the deactivated state. This time mode employs the electrical energy stored in the capacitors and/or the rechargeable battery 515 to power the LED 400 for a fixed period of time after the voltage multiplier 140 has been switched to the deactivated state. This fixed period of time can be preprogrammed into the holdup time control circuit 505, or selected by the user of the spray gun 10a and inputted into the holdup time control circuit 505 using a user input (not shown). The fixed period of time can be determined by the operator during operation of the spray gun 10a, or may be predetermined based upon the coating operation being performed or the work piece being inspected. In a third time mode, the power supply 401 is configured to maintain the LED 400 in the lit state following the actuator assembly 45 switching the voltage multiplier 140 from the activated state to the deactivated state for a variable period of time that corresponds to the time until the electrical energy stored in the power supply 401 is completely depleted. When the electrical energy stored in the power supply 401 is completely depleted, the LED 400 will switch from the lit state to the unlit state. Alternatively, the LED 400 will then transition to drawing electrical energy from an external power source connected to the power supply 401 via a wired connection. As such, the variable period of time that the LED 400 remains in the lit state in the third time mode is not constant, as it will depend upon such factors as the capabilities and characteristics of the particular power supply 401, how long the capacitors and/or the rechargeable battery 515 have had to charge before the voltage multiplier 140 was switched to the deactivated state, and the initial energy of the capacitors and/or the rechargeable battery 515 upon initially switching the voltage multiplier 140 to the activated state.
The light assembly 15a may also be operated in different color temperature modes. Color temperature relates to the color characteristics of light, and can be quantified as a numerical value measured in degrees Kelvin (K) on a scale from 1,000 K to 10,000 K. For example, lights having a color temperature from about 2,000 K to about 3,000 K may be referred to as “warm white” lights and may have an orange or yellow appearance, lights having a color temperature from about 3,000 K to about 4,500 K may be referred to as “cool white” lights and may have a neutral white or slight bluish appearance, and lights having a color temperature from about 4,600 K to about 6,500 K may be referred to as “daylight” lights and may have a blue and white appearance that replicates daylight. When using the spray gun 10a, different types of light with varying color temperatures may be required in different scenarios. Factors that may affect the desired color temperature of light include the ambient light sources that exist, the type of coating material being used, and the type of work piece to which the coating material is being applied. The spray gun 10a may include the color temperature control circuit 530 to control the color temperature of the LED 400. Likewise, the LED 400 may be a type of light that allows for variable color temperature. The user of the spray gun 10a may change the color temperature of the LED 400 by adjusting a user input (not shown) connected to the color temperature control circuit 530, or by programming the color temperature control circuit 530 before initiating use of the spray gun 10a. The color temperature of the LED 400 may be configured to be any level as desired. For example, in one embodiment the color temperature of the LED 400 may be from about 2,700 K to about 3,400 K. In another embodiment, the color temperature of the LED 400 may be from about 4,000 K to about 6,000 K.
The light assembly 15a can further be operated in different focus modes. During operation of the spray gun 10a, the light assembly 15a can be used to inspect work pieces of various sizes or distances from the spray gun 10a. As a result, the beam width of light emitted by the light assembly 15a can be broadened or narrowed, such as from a first beam width to a second beam width that is different than the first beam width, in order to provide an optimal level of focus for use with a particular work piece or powder type. In one embodiment, this can be accomplished by replacing a first lens of the light assembly 15a, which can be lens 264, as described above in connection with light assembly 15, with a different lens. However, other means for changing the focus mode of the light assembly 15a are contemplated.
In addition to the time and color temperature modes, the light assembly 15a may also be operated in several brightness modes, with each brightness mode corresponding to a different level of brightness of the LED 400. The brightness of the LED 400 may be altered for a variety of reasons, including the level of ambient light that exists in the environment the spray gun 10a is being used in, the type of coating material being applied, the type of work piece to which the coating material is being applied, and the eyesight quality of the user of the spray gun 10a. Additionally, lower brightness levels of the LED 400 may be used when the user of the spray gun 10a desires to save power and/or wants the light to remain in the lit state for a longer period of time. The brightness mode of the light assembly 15a can be changed using a user input (not shown) that is connected to the brightness control circuit 525. Alternatively, the brightness mode can be changed by actuating the actuator assembly 45 in different ways. For example, when the voltage multiplier 140 is in the activated state, a first actuation of the actuator assembly 45 may be configured to switch the voltage multiplier 140 to the deactivated state, and the power supply 401 may be configured to maintain the LED 400 at a first brightness level in the lit state. The first brightness level may define a first brightness mode. Alternatively, when the voltage multiplier 140 is in the activated state, a second actuation of the actuator assembly 45 may be configured to switch the voltage multiplier 140 to the deactivated state, and the power supply 401 may be configured to maintain the LED 400 at a second brightness level in the lit state. The second brightness level may define a second brightness mode. The second brightness level may be less than the first brightness level, or alternatively may be greater than the first brightness level. Alternatively, when the voltage multiplier 140 is in the activated state, a third actuation of the actuator assembly 45 is configured to switch the voltage multiplier 140 to the deactivated state, and the power supply 401 is configured to maintain the LED 400 at a third brightness level in the lit state. The third brightness level may define a third brightness mode. The third brightness level may be less than either or both of the first and second brightness levels, or the third brightness level may be greater than either or both of the first and second brightness levels. The light assembly 15a can include less or additional brightness modes as desired. Additionally, the method of choosing between brightness modes can employ user inputs other than the actuator assembly 45, and methods of using the actuator assembly 45 to choose between brightness modes other than those listed above can be used.
Though specifically described above in relation to changing the brightness mode, various other properties of the operation of the LED 400 can be changed by actuating the actuator assembly 45 in different ways. For example, the time mode, focus mode, and/or the color temperature of the LED 400 can be changed by actuating the actuator assembly 45 in different ways. In one embodiment, the first, second, and third actuations of the actuator assembly 45 as previously mentioned can refer to a single actuation of the actuator assembly 45, a quick double actuation of the actuator assembly 45 (i.e., the actuator assembly 45 is actuated twice in rapid succession), and a quick triple actuation of the actuator assembly 45 (i.e., the actuator assembly 45 is actuated three times in rapid succession), respectively. Additionally, the brightness mode, time mode, focus mode, and/or the color temperature of the LED 400 can be changed by means other than the actuator assembly 45, such as through actuating the manually actuated inputs 436, including the first and second switches 438, 442, as well as the first and second buttons 454, 458 of the display 430 as described above. As such, the components of the display 430 can be used to increase and decrease, as well as alternate between the brightness level, time mode, focus mode, and/or color temperature of the LED 400.
In operation, the spacing and orientation of the inductor 259 relative to the transformer 160 is a large factor in increasing the efficiency with which the inductor 259 obtains energy from the magnetic field H. In particular, the inductor 259 obtains more electrical energy from the magnetic field H when the transformer 160 and the inductor 259 are spaced closely together. Additionally, the magnetic field H induces a higher energy transfer in the inductor 259 when the transformer 160 and the inductor 259 are oriented either perpendicularly or parallel to each other. As a result, in one embodiment, the transformer 160 and the inductor 259 may be radially aligned relative to the longitudinal direction 2, such that a radius extending from within the gun body 11a in a direction that is perpendicular to the longitudinal direction 2 passes through both the transformer 160 and the inductor 259. This ensures that the transformer 160, which is disposed within the gun body 11a, and the inductor 259, which is disposed in the light assembly 15a, are spatially as close together as possible. Also, the first central axis A1 of the transformer 160 and the second central axis A2 of the inductor 259 may both be parallel to the longitudinal direction 2. In this embodiment, the first central axis A1 and the second central axis A2 are parallel to each other, such that the transformer 160 and the inductor 259 are oriented parallel with respect to each other. In another embodiment, the first central axis A1 of the transformer 160 may be parallel to the longitudinal direction 2, while the second central axis a2 of the inductor 259 may be perpendicular to the longitudinal direction 2. In this embodiment, the first central axis A1 and the second central axis A2 are perpendicular to each other, such that the transformer 160 and the inductor 259 are oriented perpendicular with respect to each other. In another embodiment, the first central axis A1 of the transformer 160 may be perpendicular to the longitudinal direction 2, while the second central axis A2 of the inductor 259 may be parallel to the longitudinal direction. In this embodiment, the first central axis A1 and the second central axis A2 are perpendicular to each other, such that the transformer 160 and the inductor 259 are oriented perpendicular with respect to each other.
The light assembly 15a may also be configured such that the LED 400 may be spatially separated from the power supply 401 and the circuit 410. In one embodiment, as shown in
Continuing with
Unlike the spray guns 10, 10a, a coating material supply 660 can supply coating material to the spray gun 10b through a supply hose 664 that connects to the spray gun 10b at the forward end of the barrel 634, as opposed to through the handle 632. The supply hose 664 can transport the coating material to an outlet tube 18 that extends from the forward end of the barrel 634 to a nozzle 620 attached to the barrel 634. The nozzle 620 can include a slot 623 for spraying the coating material received from the outlet tube 18 out of the spray gun 10b. Though shown as a horizontal slot, it is contemplated that the slot 623 can define other shapes to produce different spray patterns.
Like the spray guns 10, 10a, the spray gun 10b can also include an electrode support assembly 612 disposed within the nozzle 20. The electrode support assembly 612 can support an electrode 614, which is configured to establish an electric field that charges the coating material as it exits the nozzle 620. The electrode 614 receives high voltage electrical energy from a voltage multiplier 666 that includes a transformer 668. When a user actuates the actuator assembly 645, the voltage multiplier 666 is transitioned from a deactivated state to an activated state, in which the voltage multiplier 666 supplies the high voltage electrical energy to the electrode 614. Additionally, in the activated state, the transformer 668 produces a magnetic field H, which can induce a current in the inductor 259 of the light assembly 15. The power harvesting aspects of the light assembly 15 are described at length above, and will not be repeated here for brevity.
Continuing with
When the light assembly 15 is attached to the spray gun 10b with the sleeve 700, the sleeve 700 is in contact with the gun body 611. Specifically, the lower surface 704b of the base 704 is in contact with the barrel 634 of the spray gun 10b. The light assembly 15 contacts the upper surface 704a of the base 704, and can be positioned such that the thread insert 216 aligns with the upper bore 712 of the extension 708. The second screw 718 can be disposed through and engage the upper bore 712 and the thread insert 216 to couple the light assembly 15 to the spray gun 10b. The light assembly 15 and sleeve 700 can also be positioned such that the lower bore 710 of the extension 708 aligns with a bore 670 that extends into the barrel 634 of the spray gun 10b. The first screw 716 can be disposed through and engage the lower bore 710 and the bore 670 to attach the light assembly 15 and sleeve 700 to the spray gun 10b. Though the light assembly 15, sleeve 700, and spray gun 10b are described as attached through first and second screws 716, 718, other means of attachment are contemplated, such as snap fit, bayonet, etc.
While various inventive aspects, concepts and features of the inventions may be described and illustrated herein as embodied in combination in the exemplary embodiments, these various aspects, concepts and features may be used in many alternative embodiments, either individually or in various combinations and sub-combinations thereof. Unless expressly excluded herein all such combinations and sub-combinations are intended to be within the scope of the present inventions. Still further, while various alternative embodiments as to the various aspects, concepts, and features of the inventions—such as alternative materials, structures, configurations, methods, circuits, devices and components, software, hardware, control logic, alternatives as to form, fit and function, and so on—may be described herein, such descriptions are not intended to be a complete or exhaustive list of available alternative embodiments, whether presently known or later developed. Those skilled in the art may readily adopt one or more of the inventive aspects, concepts or features into additional embodiments and uses within the scope of the present inventions even if such embodiments are not expressly disclosed herein. Additionally, even though some features, concepts or aspects of the inventions may be described herein as being a preferred arrangement or method, such description is not intended to suggest that such feature is required or necessary unless expressly so stated. Still further, exemplary or representative values and ranges may be included to assist in understanding the present disclosure; however, such values and ranges are not to be construed in a limiting sense and are intended to be critical values or ranges only if so expressly stated. Moreover, while various aspects, features, and concepts may be expressly identified herein as being inventive or forming part of an invention, such identification is not intended to be exclusive, but rather there may be inventive aspects, concepts, and features that are fully described herein without being expressly identified as such or as part of a specific invention, the scope of the inventions instead being set forth in the appended claims or the claims of related or continuing applications. Descriptions of exemplary methods or processes are not limited to inclusion of all steps as being required in all cases, nor is the order that the steps are presented to be construed as required or necessary unless expressly so stated.
While the invention is described herein using a limited number of embodiments, these specific embodiments are not intended to limit the scope of the invention as otherwise described and claimed herein. The precise arrangement of various elements and order of the steps of articles and methods described herein are not to be considered limiting. For instance, although the steps of the methods are described with reference to sequential series of reference signs and progression of the blocks in the figures, the method can be implemented in a particular order as desired.
This application is a continuation of U.S. patent application Ser. No. 16/714,991, filed Dec. 16, 2019, which is a continuation of U.S. patent application Ser. No. 15/927,550, filed Mar. 21, 2018, which claims the benefit of U.S. Provisional Patent App. No. 62/474,580, filed Mar. 21, 2017, the entire disclosures of which are hereby incorporated by reference as if set forth in their entirety herein.
Number | Name | Date | Kind |
---|---|---|---|
5341989 | Fulkerson | Aug 1994 | A |
5725161 | Hartle | Mar 1998 | A |
9409196 | Lucas | Aug 2016 | B1 |
10539318 | Fulkerson et al. | Jan 2020 | B2 |
20020131267 | Van Osenbruggen | Sep 2002 | A1 |
20070159819 | Bayat et al. | Jul 2007 | A1 |
20170089555 | Honeycutt, III | Mar 2017 | A1 |
20170173607 | Wright | Jun 2017 | A1 |
20170291181 | Wright | Oct 2017 | A1 |
20180317627 | Fukuda et al. | Nov 2018 | A1 |
20190060922 | Wright | Feb 2019 | A1 |
Number | Date | Country |
---|---|---|
2192124 | Mar 1995 | CN |
201132146 | Oct 2008 | CN |
101687583 | Mar 2010 | CN |
202012840 | Oct 2011 | CN |
104754844 | Jul 2015 | CN |
204986802 | Jan 2016 | CN |
205217185 | May 2016 | CN |
205253411 | May 2016 | CN |
205341132 | Jun 2016 | CN |
106256443 | Dec 2016 | CN |
4203989 | Aug 1993 | DE |
Entry |
---|
IPEA/409—International Preliminary Report on Patentability dated Oct. 3, 2019 for WO Application No. PCT/US18/023546. |
ISA/220—Notification of Transmittal of Search Report and Written Opinion of the ISA, or the Declaration dated May 30, 2018 for WO Application No. PCT/US18/023546. |
Number | Date | Country | |
---|---|---|---|
20210207795 A1 | Jul 2021 | US |
Number | Date | Country | |
---|---|---|---|
62474580 | Mar 2017 | US |
Number | Date | Country | |
---|---|---|---|
Parent | 16714991 | Dec 2019 | US |
Child | 17208281 | US | |
Parent | 15927550 | Mar 2018 | US |
Child | 16714991 | US |